Improvement in car-springs



E. MYERS.

Car Springs.

Patented'May13. 1873.

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y Inventor-1 ad Per - Attorneys.,

AM Puom-L/rf/asnAPll/c m. m'. (assams mocfssf) UNITED STATES PATENT OEEIGE.v

EDWARD MYERS, OF JERSEYf'CITY,"NEW JERSEY.

IMPROVEMENT IN CAR-SPRINGS.

Specication forming part of Letters Patent No. 138,920, dated May 13, 1873 ;y application iled April 26, 1873.

To all whom it may concern:

Be it known that I, EDWARD MYERS, of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Graduated Spring', of which the following is a specification:

Figure l is a top view of my improved spring arranged as a car-spring. Fig. 2 is a vertical section of the same taken through the line .r x, Fig. l. Fig. 3 represents the same arranged as a draft-spring for cars. Fig. 4 is a sectional view of the same taken through the line y y, Fig. 3.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved spring, which shall be so constructed as to be equally elastic whether under more or less pressure, and which shall, at the same time, be simple in construction, neat and compact, strong and durable, and not liable t0 get out of order. The invention consists in the concentric graduated springs, each inner spring being made shorter than the next outer one, arranged in the spaces between concentric ring-flanges formed upon the baseplate of one or both parts of the case, and operated upon by a similar set of concentric ring-flanges formed upon the base-plate of the other part of the case; and in the combination of a central draft-rod with the double concentric graduated spring, as hereinafter fully described. A

The case of the spring is made in two parts, A B, each part consisting of a circular plate provided, upon one side, with three, more or less, concentric rin g-langes, the flanges of the one part, as A, fitting into the ring-spaces between the anges of the other part, as B, as shown in Figs. 2 and 4. In the spaces between the concentric ring-flanges of one or both the parts A B are placed Vcoiled springs C, one end of which rests upon the base-plate, and upon their other ends rest the edges of the flanges of the other part. The inner spring G is made the shortest, the next one a little longer, and the outer one the longest, so that when rst put under pressure the outer or weakest spring may'rst act. As the pressure increases the next outer spring comes into action, and so on until the inner spring is put under pressure, which will seldom happen. The springs C may -be all madel of material of the same size, the less diameter of each inner spring making it stronger than the next outer one. One of the parts may be made with a central core, which enters a central recess in the other part, and should be made a little higher than the concentric iianges of the said part, so as to serve as a stop for the plate of the other part to strike against should the spring be subjected to extraordinary pressure to keep the springs from being crushed or injured by said pressure. The cases of the parts A B should have holes formed through them in convenient places to allow the air to pass in and ont freely.

Figs. 3 and 4 represent my improved spring arranged as a draft-sprin g to prevent any sudden jar or shock when the car is started or stopped. In this case the spring is made double, the two innerparts being formed in one solid piece, and being in the form of a plate with concentric ring-flanges upon each side.

D is the draw-bar, which passes through p the centers of all the parts, works freely in the middle parts, and is bolted to the outer parts. The inner parts are secured to the carbody.

With this construction, When the draft is applied, the pressure comes upon the inner or rear set of springs, each outer spring coming successively into action until the car is gradually started without any sudden jar or shock.

In stopping the car, the forward parts of the double spring operate in the same way, stop'- ping it without any jar or shock.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. The concentric graduated springs C, each inner spring being made shorter than the next outer one, varran ged in the spaces between concentric rin g-fianges formed upon the end plate of one or both parts of the case, and to be operated upon by a similar set of concentric rin g-anges formed upon the end plate of the other part of the case, substantially as herein shown and described.

2. The combination of a central draft-rod, D, with the double concentric graduated spring A B C, substantially as herein shown and'described.

p EDWARD MYERS, Witnesses:

JAMEs T. GRAHAM,-

T. B. MosEER. 

